Type-writing machine.



N. H. `ANDERS0N,

TYPE WRITING MACHINE.

A-PPLICATION FILED AUGI 6, I9I3I.\` l v Patented Apr. 30, 1918.

WW1/wonen; I

N. H. ANDERSON. TYPE WRlTlNG'MACHlNE l'APPLICATION FILED AUG.5. 1913.

Patented Apr. 30,1918.

2 SHEETS-SHEET 2.

Cil

nine n. Eason,

0F MIFDLETOWN, CONNECTICUT, ASSIGNOR T0 THE NOISELESS CONNECTICUT.

Lantana.

` To Il :elw/n it may concern:

lle. it known that. llj` 'N1-is H. Axnsnsox,

a citizen of thc-linited States, residing at ,and Stateot' -(`oiinecticut, havil invented certain newand useful Improvements in`'lllype-ll'riting Machines. of which the following is a full. clear,and exact description', l

such as will enable others skilled in the art lto which it appertains tomake and usevthe same. I .4

'lhisinvention relates to typewriting machines. and with regard tocertain more specific features'thereof, to that mechanism or part of atypewriting machine known to those familiar with the art as back-spacingmechanism.

. lUne. of the objects of the present invention is to provide a simpleand practicalv back-spacing mechanism which will be ellicient in use andnoiselessin operation. Another object is to provide a device of theabove character which will bev cheap to manufacture and easy toassemble'v and in stall. Arfur'ther ob'ect is to provide a device of theabove character permitting of ready adjustmentuiider varying conditionsand adapted tofrelieve strain upon movable parts when movementof' otherparts connected therewith is positively' prevented. Other objects willbe in art obvious and in 'part pointed out hereina ter.

'lhe invention accordingly consists in the features 'of construction,combinations of elements and arrangement of parts which will beexemplified in the construction hereinafter set forth, and the scope ofthe ap 1i-` cation 'of which will be indicated in the ollowing claims.

lin the accompanying drawings, in which is illustrated one of thevarious possible embodiments of the several features of the'invention,

Figure 1 is a side elevation of the backspacing mechanism and suchassociated and (zo-acting arts as appeal' necessary to Sulliciently 1'1ustrate one embodimentof the `present invention;

Fig. 2 is a plan view thereof ;r

Fig. 3 is a detail view showing the movement of the back-spacing dog;and

Fig. l is an end elevation, partly in sec- ,.tion, of .a portion koftheamechanism shown in Fig. 2

Specification of Letters Pat-ent.` i Mlgiltinttetll Alpi'. lill, lill vlApplication tiled august 6, 1913. Serial No. 783,333. 'I' i TYPE-WRITINGMACHINE.

Referring now in .detail to the drawings.. I

.and more particularly to Figs.' 1 and 2,

is denoted l, v-1 and.'2 opposite #si-dc; wall por-` tions otI the frameot'. the nmchine adapted to be connectedby a transverse'supporting'member from which is suspended a U- shaped escapement bracket/4. vThis:mem ber l is adapted to support a rocker member 5 carrying escapementmechanism'ti ot" :in v desired form` but preferabl') one of theseveralforms of Noiselessl escapemeut mechanism. such as shown. for example. inpalent to Kidder and Spousel'. Serial No. 871,281, issued November 19.1210i'. The capement mechanism is. as iswell known. designed to eo-actwith a carriagewolurolling rack, such as an escapemeut wheel T.

connected with the carriage (not herein there 1 shown), forcontrolling-- its normal l etter Vspace movement.V

The back-spacing mechanism now to be, described is also adapted toco-aetthrough a dog 9 directly with the same-escapement Wheel T, trotate the wheel in the opposite direction gainst the action of thecarriage/- drive spring for returning the carriage to a former letterprinting position. in `order that a correction or reprintingr ol' acharacter may be more convenienttv l'gerformed. There are` otl Nurse.other objects and 'advantages obviousl to those familiar with the artand the practical operation ot' a typewriting machine which it isbelieved are un necessary to refer to in detail. n

This baclespacing mechanism comprising an actuating key 10 convenientlypositioned in the ke board of the machine-and connected by a lint andlevers with the back-spacing dog 9, which latter, until operated, liesadjacent but normally out of contact with, the escapement wheel 7. 'llhekey 10 is secured to one end of a` vkey-levery 11 pivotally mounted upona shouldered nut 12 engagllt) ing a` boss or stud 13 'proieetinginwardlyA by the comb member 14.

es'capement wheel, where of back space'key 10,' is, of course, limitedAs soon as thekey is released, the spring Atensioned by the downwardmovement, acts upon the arm 34 to return the parts silently to theiroriginal or i varm co-acts with lthe adjusting screw 41 normal position.The

at the .end of the rearward movement, thus tion just clear ofthe path oftravel of the it may besubsevquentlyactuated without moving .asufficient distance to produce any clicking noise. It is, of course,understood that the escapement. mechanism 6 co-acts` with the succeedingteeth of the escapement wheel to prevent a returnmovement thereof.' 1

If, for any reason, further backward ovement 'of the carriage andacorrespond- 'ing movement of the escapement wheel is positivelyvprevented, the spring 23 connectmg the levers ll'and 18Wvill take up theforce exertedand relieve the strain upon the moregdelicate parts.

'From'the above description, it will be seen that the presentvconstruction is of a simple and practical'v nature, inexpensive tomanufacture and designed to accomplish, among others, `all of theobjectsand advantages Asmany changes could be made in the above', constructionand many apparently this invenit is intended that all vthe Scopethereof, l

in the above description or `matter contained s'hown in the accompanyingdrawings shall 'be interpreted as illustrative and not in a.limitingsensa Having described invention, what I claim as new andPatent ist 4- :1. a 'ftypewriting machine, in combina tion, a'.-carriage-controlling rack, a backspacing dog therefor having means tolimit desire to secure 4by Letters movement thereof, and a stop to coactwith trolling the normal 'said means for vnormally maintaining saiddog-out of engagement with said rack.

`2.'.In'a typewriting machine, in combination, an escapementrack, a dogrocker, a supporting bracket for said rocker, a back- Spacing dog, and astop o n saidbracket conposition of said backspacing. dog.

3. In a typewriting machine, in combi-nation, a horizontally disposedrack wheel at the rear of the machine, a back-spacing key operativeconnecting means between said elements including a medially pivotedlever extending transversely-at the rear of the machine, and -a -spacingdog pivoted thereon adjacent tively prevented. T he downward movement32, which has been the dog toa posiadapted to co-act therewith,

4. In a typewriting machine, v'incombina- I tion', a horizontally.disposed escapement wheel at the rear center of the machine,an actuatinchine, a to said key, a thrust member attached tothe other endof saidlever, and ya transversely extending medially pivoted lever lattachedtol said thrust member and provided at its opposite end with a pivotallymounted backspacing dog to cooperate with said wheel. v '5. In atypewriting machine, in combination,` an escapement rack, a dog ladaptedto co-act. therewith, an actuating key, connections between said key anddog including a two-part b'ell crank lever, and yielding means forholding said parts of said-bell'. crank lever in relatively fixedrelation. f 6. In a typewriting machine, in combination, an escapementrack, a do adapted to co-act therewith, an .actuating ey, connec-v tionsbetween said key and dog including a two-part bell crank lever, andspring means yieldingly'holding said partsin normal fixed relation.

tion, an escapement'rack, a backfspacing dog `adapted to coacttherewith,- lanactuating key, connections between said key vand dogincluding a two-part bell crank lever, projecting portions on each ofsaid parts, and spring means connecting said portions for holding theparts of said lever-in normal fixed relation.

8, In a typewriting machine, in'combinahaving a normal operativeposition at right angles thereto,'and spring means connecting saidlevers and adapted to hold them in such normal position except whensubjected to undue strain.

`9.' In a typewriting machine, in combination, an escapenient rack, aback-spacing dog an actuating key, connections between said key and-dogt'lncluding a pivotallyinounted lever, a support upon which said leveris mounted, and a l coil spring about said support, one end of which isadjustably mounted. and the other end of which is adapted to elo-'actwith ysaid lever for returning the parts to normal position.

l0. In a typewriting machine, in combination, a rack, a back-spacing dogadapted to co-'act therewith, an actuating key, connections between saidkeyand dog including a pivotally mounted lever, an arm on said leverforming a bearing therefor, and a coll spring positioned about the pivotand coacting with said arm.

11. In a typewniting machine, in combinaltion, a rack, a back-spacingdog adapted to eo-aet therewith, an actuating key, connections betweensaid keyand dop,` including a lever. pivotally mounted near its middle,an

die, an arm on said lever toi-ming a bearing therefor` a coilspringpositioned about the pivot and eo-acting` with said arm, and meansadapted to ad] ust the tension of said spring, said means including` anadjustablenut to which one end of the coil spring 1s secured, andlocking means for holding, the nut in adjusted position.

13. In a typewriting machine, in combination, a rack, ay baek-spaeinfrdog` adapted to eo-act therewith, an aetf` inf key, eonnectionsbetween'said key and. dog ineluding,` a pivotally mounted lever, an armon said lever forming, a bearing therefor, a coil spring positionedabout the pivot and eoacting with said arm, and means adapted to adjustthe tension of said sprine.

14. In a typewriting.machine, in combination, a rack, a back-spacing dogadapted to co-aet therewith, an actuating key, connections between saidkey and dogl ineluding' a lever pivotally mounted near its 1nidelle, anda support for said lever comprising aI shouldered screw, the lever'beingl mounted upon the shoulder of said screw.

15. In a typewriting` machine, in combination, a rack, a back-spacingdog` adapted to eo-aet-therewith, an actuatingA key, connections betweensafid key and dog including a pivoted lever, an arm on .said leverforming abearing therefor, a coil spring positioned about the pivot andcci-acting.

. with said arm, and means adapted to adjust the tension of said spring,said means including a stud supported from tho frame of the n'iaehine,and a shouldered lock screw engaging a tapped'out portion of said stud,said lever being adapted to turn on the shouldered portion ot saidscrew.

1G. In a typewriting' machine, in eonibination, a rack, a back-spacingdogadapted to co-aet therewith, an actuating key, connections betweensaid key and dog' including' a pivotcd lever, a coil spring` positionedabout the pivot and cont-.tine` with said lever, and means adapted toadjustthe. teusion of said springincluding a nut supported from thetraine of the machine to which the spring' is connected, and ashoiildei'cd screw engaging,r said nut. said lever being adapted to turnon the shouldefijcd portion of said screw.

17. In a typeivriting' machine, in con'ibination, a. rack, abtu-.k-spaciup, dog adapted to co-act therewith, a key at the ,keyboardof the machine. and intermediate conuections between the dog' and thekey con'ipiisinga lever upon which the key is mounted, a second leverupon which the dog is mounted, a Connecting link between Said levers,said back-spacing do;l having a plurality of arms, one ot' which isadapted to engage the top and'side ot' a tooth on said rack and anotherot' which is adapted to enter the space `between two ot' the Succeeding'teeth to prevent overthrow of Said rack.

18. In a typewriting;l machine, in combination. an escapcment rack, aback-spacing dog adapted to co-act therewith. :i key at the keyboard ofthe machine, intermediate com'iections between the dogg,` and the keycomprising` a, lever upon which the key is mounted, a second lever uponwhich the dogg is mounted, a connecting link between said levers, saidback-spacing dog haviinc` a. irilurality of arms, one of which isadapted to engage the top and side of a tooth on the eseapement rackandanother oi' which NILS II. ADI) (SON.

Witnesses .latins lx. GUY, EDWARD N. SLAVIN.

